<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

	<link rel="stylesheet" type="text/css" href="css/pid-toolbar.css" >
 <script src="./jquery.min.js"></script>
	<style>
        * {
            margin:0;
            padding:0;
        }
       
	
    </style>
</head>
<body style="margin:50px;">

	<div style="position:relative; color:#000;width:500px; height:400px;background:#111;"> 
		<div style="position:absolute; right:0; top:0; background:#F00; width:200px; height:100%">我在最上层</div> 
	</div> 
</body>
<script>

</script>
</html>